PREPARATION AND SOLIDIFICATION CHARACTERISTIC OF IN SITU DIRECTIONALLY SOLIDIFIED EUTECTIC Al_(11)La_3/Al COMPOSITE

Acta Metallurgica Sinica (English Letters) ›› 1993, Vol. 6 ›› Issue (5): 278-282.

• Research paper • Previous Articles Next Articles

PREPARATION AND SOLIDIFICATION CHARACTERISTIC OF IN SITU DIRECTIONALLY SOLIDIFIED EUTECTIC Al_(11)La_3/Al COMPOSITE

Received:1993-10-25 Revised:1993-10-25 Online:1993-10-25 Published:2009-10-10

Abstract

Abstract: In situ eutectic Al_(11)La_3/Al composite material with regular arrangement was prepared by zone melt liquid metal cooling directionally solidification under conditions of high temperature gradient G=700K/cm and growth rate R=6.0-20.0μm/s.Superpose diffraction pat- tern of Al_(11)La_3/Al composite shows that the preferred growth direction is[100]Al// [33]Al_(11)La_3,and the habit plane is(002)Al//(116)Al_(11)La_3.A low density(103)twin is ob- served in Al_(11)La_3 and the growth of(103)twin induces to branching to change the interlamellar spacing.

Key words: eutectic solidification, directional solidification, AI+(La, Al)

DONG Hongbiao JI Yongyi ZHU Jun LU Shuzu ZHONG Xueyou University of Science and Technology,Beijing,ChinaLI Jianguo Northwestern Polytechnical University,Xi'an,China DONG Hongbiao,lecturer,Department of Metallurgy,University of Science and Technology Beijing,Beijing 100083,China. PREPARATION AND SOLIDIFICATION CHARACTERISTIC OF IN SITU DIRECTIONALLY SOLIDIFIED EUTECTIC Al_(11)La_3/Al COMPOSITE[J]. Acta Metallurgica Sinica (English Letters), 1993, 6(5): 278-282.

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PREPARATION AND SOLIDIFICATION CHARACTERISTIC OF IN SITU DIRECTIONALLY SOLIDIFIED EUTECTIC Al_(11)La_3/Al COMPOSITE

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